<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    p {
        background-image: linear-gradient(45deg, red, pink);
        -webkit-background-clip: text;
        color: transparent;
    }
</style>

<body>
    <p>哈</p>
</body>

</html>